|Publication number||US5467006 A|
|Application number||US 07/993,760|
|Publication date||Nov 14, 1995|
|Filing date||Dec 21, 1992|
|Priority date||Dec 21, 1992|
|Also published as||DE4337978A1, DE4337978C2|
|Publication number||07993760, 993760, US 5467006 A, US 5467006A, US-A-5467006, US5467006 A, US5467006A|
|Inventors||Ronald I. Sims|
|Original Assignee||Ford Motor Company|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (42), Non-Patent Citations (7), Referenced by (52), Classifications (44), Legal Events (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This invention was developed (in part) with U.S. government funds. The U.S. government may have certain rights in this invention.
This invention relates to providing energy to electric vehicles. More specifically, the present invention relates to a control system for controlling the transfer of energy into an electric vehicle.
Extending the operating range of an electric vehicle is desirable to make electric vehicles commercially successful. One way of achieving this is to minimize the energy requirements of the vehicle while in use. Lighter materials, higher efficiency motors and aerodynamic styling have been employed to reduce energy use. But these features do not reduce or eliminate the energy requirement to maintain a desired interior cabin temperature. U.S. Pat. No. 5,000,139 discloses the use of a remotely controlled timer for automatically starting an internal combustion engine and subsequently controlling the climate control system based on predetermined temperature settings. This system provides a pre-warmed or pre-cooled car for added comfort to the operator over a conventional starting system. A problem associated with systems incorporating timers and remote activation signals for their operation is their continuing requirement for operator input. The system disclosed requires the operator to manually set timers and to activate the system.
It is also desirable to optimize the battery charging of an electric vehicle to take maximum advantage of reduced cost time of day energy rates and to insure the battery is sufficiently charged for the next anticipated use of the vehicle. Timers do not consider the battery state of charge and the optimum charging parameters to deliver the most efficient energy transfer rate possible. It is desirable to have a system that would automatically determine the information necessary to automatically implement any available efficiencies. It would be further desirable to have a system that would automatically invoke any efficiencies without reliance on regular operator input.
According to the present invention, a method and device is disclosed for providing energy to an electric vehicle. The invention provides a method for providing energy from a stationary energy source to an electric vehicle comprising:
determining an energy requirement of the electric vehicle;
deriving an energy transfer rate; and
transferring energy from the source to the electric vehicle at the rate.
An energy transfer device to implement this method includes:
a stationary energy source;
a device for determining an energy requirement of the electric vehicle;
a device for deriving an energy transfer rate based on the requirement; and
a device for transferring energy from the source to the electric vehicle at the rate.
The method and apparatus have a variety of uses, but two uses specifically intended include charging the electric vehicle battery and achieving a desired interior cabin temperature using energy from a stationary source rather than the electric vehicle battery. The method for providing energy to an electric vehicle comprises determining energy requirements of the electric vehicle, deriving an energy transfer rate, and transferring energy to the electric vehicle at the derived energy transfer rate.
The invention includes a usage log to approximate when the next anticipated use of the vehicle will occur. This feature allows automatic implementation of processes assuring the most efficient and economical utilization of energy. These and other objects and advantages of the present invention will become apparent from the drawings, description and claims which follow.
FIG. 1 is a schematic block diagram showing the construction of one embodiment of the invention.
FIG. 2 is a flow chart for the computation of the energy transfer rate according to one embodiment of the invention.
FIG. 3(a-c) are representative energy transfer rates derived according to present invention.
The invention will be described as a method and device for providing energy to an electric vehicle. More specifically, the invention will describe automatically determining and providing energy for charging the battery and pre-heating or pre-cooling the interior passenger compartment for an electric vehicle. These are examples of the type of opportunities available for application of the present invention, and are intended for the purpose of illustration rather than limitation.
The invention is intended to be an integral energy transfer device handling all energy between a stationary power source such as an electrical outlet and an electric vehicle. In the alternative, the invention may be used solely to accommodate various components such as battery charging or temperature management.
When the invention is used as a battery charger, it provides the opportunity to take advantage of discounted energy rates while simultaneously optimizing battery charging characteristics. It is anticipated that electric vehicles would be eligible for reduced price electricity during the lowest demand periods. These low demand periods generally occur at night. The invention also permits the charging algorithm to be specifically tailored to the individual battery being charged. For example, electric vehicles will tend to be used as commuter cars driving the same distance to and from work everyday. This use will tend to discharge the battery the same amount everyday. Some types of batteries, for example nickel cadmium, tend to exhibit a memory effect when repeatedly discharged by the same amount. By measuring the state of charge of the battery and predicting the next anticipated use, the battery may be charged so as to avoid this memory effect. All these features may be achieved without operator input.
Illustrated in FIG. 1 is a schematic for an energy transfer device 10. It is anticipated that device 10 would be located onboard an electric vehicle. Device 10 is connected to a stationary energy source 12 which is usually an A/C electrical outlet. The invention is also useful in D/C charging or inductive charging. Device 10 receives A/C electrical current into energy distribution center 14. Distribution center 14 supplies energy to controller 16. Controller 16 controls the amount and distribution of electrical energy. Controller 16 may be overridden by switch 18 and receive user desired settings such as the time or length of the next anticipated use through user controller 20. Controller 16 is connected to battery 22 and provides a charging current. Battery controller 23 is connected between battery 22 and controller 16 and measures the battery state of charge and controls battery charging.
Controller 16 includes an input/output (I/O) device 24 for receiving and directing electrical energy. I/O device 24 may include solid state or mechanical switching devices. Computer processing unit 26 controls the operation of device 24. Permanent memory 28 establishes the initial and overall operating parameters for controller 16. Random access memory 30 is used to store vehicle use parameters to taylor the operation of controller 16 to meet the use needs of the vehicle.
FIG. 2 illustrates a schematic flow chart describing the operation of the invention. The vehicle is connected to stationary power source 12 when not in actual use. Center 14 senses the position of switch 18. If override switch 18 is activated, the battery is charged at a predetermined energy transfer rate regardless of anticipated use or time of day. This feature is useful for opportunity or convenience charging. Opportunity or convenience charging occurs when the vehicle is not in its normal overnight parking position. The predetermined transfer rate would normally be at full power current to recharge the battery in as short a time period as possible.
If the override switch is in the off position, then device 10 determines the energy requirements of the battery. Battery controller 23 determines and records on an on going basis the state of charge of battery 22. The state of charge as well as the date and time are supplied to device 16 and stored in memory 30. This information forms a data base to predict the next anticipated use and trip duration. For example, computer 26 would know what time of day the vehicle was used, energy required for each individual trip and each round trip, the day of week the battery is used and the time of day the vehicle is undergoing recharge.
Controller 23 supplies the battery state of charge measurement to controller 16. CPU 26 queries permanent memory 28 to ascertain the energy of a fully charged battery and then takes the difference between a charged battery and the measured charge to determine the energy required to bring battery 22 to a full state of charge. CPU 26 queries memory 30 to ascertain the next anticipated use of the vehicle and the energy required for this next use. CPU 26 queries clock 32 to determine the total time available for charging before the next anticipated use. CPU 26 then determines the most effective and efficient means for charging battery 22. Generally battery 22 would be charged at a level sufficient to perform the next anticipated vehicle use and begin charging when the electric utility rates are at their lowest. If the electric vehicle cannot be charged within this low cost time period, CPU 26 signals input/output device 24 to begin charging earlier at the higher cost rate to insure the vehicle is at least minimally charged for the next anticipated use.
Various charging algorithms are possible to optimize the charging to the specific battery. For instance, batteries accept charge differently based on their state of charge, temperature, charging voltage and current as well as other factors. Each of these parameters may be modified to optimize the particular charging algorithm with the individual battery. For example, nickel cadmium batteries experience a memory affect when a battery is repeatedly partially discharged to the same state of charge. The battery tends to reduce its overall energy capacity. To avoid this memory affect, device 16 can predict the next anticipated use and insure that there is a sufficient reserve energy within battery 22 to meet this anticipated use yet none-the-less not bring battery 22 to a full state of charge. It would only be partially charged so that it is next discharged to a lower state of charge then normal. This is especially important when using nickel cadmium batteries in commuter vehicle applications where they experience roughly the same daily mileage. When CPU 26 recognizes that the next anticipated use will not occur for some time, it may signal device 24 to discharge battery 22 prior to receiving a full charge.
FIGS. 3a-3c illustrate typical charging algorithms using the present invention. FIG. 3a illustrates an opportunity charging. The vehicle is charged at full power for a period of time. FIG. 3c illustrates charging at a lower power during the high cost energy rate and then increasing the charging power to a higher current during the period of lower cost. FIG. 3b illustrates initiating charging at the hight cost rate but at a low power level and then increasing the power level at a lower cost rate. Charging remains at the higher power level at the higher cost rate but terminates prior to the battery being completely charged so that full energy transfer power can be directed to a climate control device.
Either separately or together with battery charging, the invention may also be used as a climate control device to either heat or cool the interior compartment of the vehicle. Climate control device 34 receives energy from device 24 to either heat or cool the interior cabin of the vehicle. Suitable climate control devices capable of heating or cooling the interior cabin of a vehicle include thermal electric coolers, heat pumps, resistive heaters, and motor driven compressors. Device 34 is integrated with climate controller 36 which receives the interior and exterior temperatures from probes 38 and 40 respectively. Device 16 receives the climate information together with the desired temperature settings from controller 20. Device 16 determines the difference between the current interior cabin temperature and the desired temperature and calculates the amount of energy necessary for device 34 to heat or cool the cabin to the desired temperature. The exterior temperature is monitored to avoid unnecessary heating or cooling.
Time of day and day of week usage information are queried from memory 30 to enable device 16 to pre-heat or pre-cool the vehicle with energy from stationary source 12 before the next anticipated use. Illustrated in FIG. 3b is a plot of energy transfer showing both battery charging and climate control. The solid line shows energy being used for battery charging while the dashed line shows energy use for climate control. Conventional residential wiring may not permit simultaneous full power battery charging and climate control. In these circumstances, it may be desirable to terminate battery charging before engaging climate control as illustrated in the graph at FIG. 3b. The graph on FIG. 3c shows simultaneous battery charging and climate control but at reduced power levels. The total amount of energy transferred would not exceed the power handling capabilities of the associated electrical circuits.
The invention permits the use of adaptive or intelligent energy transfer schemes wherein the most efficient use of energy may be determined for a particular application. For example, it may be more efficient to terminate battery charging before the battery is fully charged and initiate climate control to extend the total vehicle range. The system also permits the climate control to work in conjunction with the battery charging so as not to overtax the electrical circuits. If the vehicle contains a thermal energy storage device, excess heating or cooling energy may be directed to this temperature storage device during low cost energy rates to be subsequently used in the operation of the vehicle.
The invention has been illustrated as a method of charging a battery and controlling the temperature of a vehicle. Other applications which require a transfer of energy from a stationary source to a vehicle are also included within the scope of the invention such as charging a super capacitor, pre-heating an internal combustion engine, and operating fans, motors and other electrical devices.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3617850 *||Dec 9, 1968||Nov 2, 1971||North American Rockwell||Battery-status device|
|US3675032 *||May 11, 1970||Jul 4, 1972||John Shaheen||Remote vehicle starting system|
|US3790806 *||Aug 18, 1972||Feb 5, 1974||V Lessard||Remote engine starting system|
|US3796940 *||Dec 27, 1971||Mar 12, 1974||Bogue J||Battery power supply,maintenance free|
|US3811049 *||Jun 21, 1972||May 14, 1974||D Hildreth||Remote control engine starter|
|US4061956 *||Aug 23, 1976||Dec 6, 1977||Utah Research And Development Company||Electronic DC battery charger|
|US4072850 *||Sep 10, 1975||Feb 7, 1978||Mcglynn Daniel R||Vehicle usage monitoring and recording system|
|US4170752 *||Sep 16, 1977||Oct 9, 1979||Ges Gesellschaft Fur Elektrischen Strassenverkehr Mbh||System for determining and calculating the work done by a mobile electrical machine at an energy supply station|
|US4236594 *||Aug 21, 1978||Dec 2, 1980||Skip D. McFarlin||System for automatically controlling automotive starting and accessory functions|
|US4296334 *||Sep 7, 1978||Oct 20, 1981||Gim Wong||Programmable electronic starting device for autos and the like with means selectable to actuate accessories|
|US4308492 *||Oct 24, 1979||Dec 29, 1981||Nippondenso Co., Ltd.||Method of charging a vehicle battery|
|US4383210 *||Jun 18, 1980||May 10, 1983||Wilkinson Rudolph P||Apparatus and method for recharging an energy storage device|
|US4446460 *||Jul 8, 1981||May 1, 1984||Transtart, Inc.||Remote starting of an internal combustion engine|
|US4460035 *||Mar 11, 1982||Jul 17, 1984||Nissan Motor Company, Limited||Air-conditioning method and system for an automotive vehicle with nonvolatile memory feature|
|US4498309 *||Aug 26, 1983||Feb 12, 1985||Nissan Shatai Company, Limited||Blower control arrangement for air conditioning unit or the like|
|US4532418 *||Dec 21, 1984||Jul 30, 1985||The Detroit Edison Company||Microprocessor electric vehicle charging and parking meter system structure and method|
|US4553081 *||May 21, 1984||Nov 12, 1985||Norand Corporation||Portable battery powered system|
|US4558281 *||Jun 8, 1983||Dec 10, 1985||Lucas Industries||Battery state of charge evaluator|
|US4564905 *||Jun 17, 1983||Jan 14, 1986||Hitachi, Ltd.||Trip computer for vehicles|
|US4598373 *||May 17, 1983||Jul 1, 1986||Mitsubishi Denki Kabushiki Kaisha||Charge control microcomputer device for vehicle|
|US4606307 *||Dec 1, 1983||Aug 19, 1986||Cook Norman E||Automatic starting system|
|US4638237 *||Jan 3, 1985||Jan 20, 1987||Pulse Electronics, Inc.||Battery condition indicator|
|US4642770 *||Apr 18, 1985||Feb 10, 1987||Deere & Company||Vehicle accessory control system|
|US4684872 *||Nov 6, 1985||Aug 4, 1987||General Battery Corporation||Battery formation charging apparatus|
|US4724528 *||May 8, 1984||Feb 9, 1988||Hewlett-Packard Company||Battery charge level monitor in a computer system|
|US4784212 *||Nov 21, 1986||Nov 15, 1988||Transmet Engineering, Inc.||Building perimeter thermal energy control system|
|US4803416 *||Aug 20, 1986||Feb 7, 1989||Jacques Abiven||Storage battery control device|
|US4820966 *||Jun 13, 1988||Apr 11, 1989||Ron Fridman||Battery monitoring system|
|US4832258 *||Apr 15, 1988||May 23, 1989||Sanden Corporation||Measuring circuit for use in device for detecting ambient air temperature|
|US4849682 *||Oct 30, 1987||Jul 18, 1989||Anton/Bauer, Inc.||Battery charging system|
|US4918368 *||Feb 29, 1988||Apr 17, 1990||Span, Inc.||System for charging batteries and measuring capacities and efficiencies thereof|
|US5000139 *||Apr 30, 1990||Mar 19, 1991||Gim Wong||Auto-starter device for internal combustion engine and the like|
|US5047961 *||Jan 17, 1990||Sep 10, 1991||Simonsen Bent P||Automatic battery monitoring system|
|US5065320 *||Feb 20, 1989||Nov 12, 1991||Kabushiki Kaisha Toyoda Jidoshokki Seisakusho||Control and display system for a battery powered vehicle|
|US5119011 *||Aug 8, 1990||Jun 2, 1992||General Electric Company||Battery state of charge indicator|
|US5281919 *||Jan 13, 1992||Jan 25, 1994||Alliedsignal Inc.||Automotive battery status monitor|
|EP0008042A1 *||Jul 26, 1979||Feb 20, 1980||Siemens Aktiengesellschaft||Heating and ventilating of electric vehicles|
|EP0526426A1 *||Jul 21, 1992||Feb 3, 1993||FIAT AUTO S.p.A.||Sensor unit for vehicle air-conditioning systems|
|EP0533317A2 *||Jun 26, 1992||Mar 24, 1993||Honda Giken Kogyo Kabushiki Kaisha||Battery cell for electric vehicle|
|EP0537081A1 *||Oct 9, 1992||Apr 14, 1993||Automobiles Peugeot||Supply battery energy control system of an electric vehicle drive motor|
|GB2105065A *||Title not available|
|WO1993002887A1 *||Aug 3, 1992||Feb 18, 1993||Technology Partnership||Battery powered electric vehicle and electrical supply system|
|1||E. H. Wakefield "History of the Electric Automobile" Society of Automotive Engineers, Inc, 1993, p. 420.|
|2||*||E. H. Wakefield History of the Electric Automobile Society of Automotive Engineers, Inc, 1993, p. 420.|
|3||*||Pursuing Efficiency IEEE Spectrum Nov. 1992.|
|4||Pursuing Efficiency--IEEE Spectrum Nov. 1992.|
|5||S. Ohba "The Development of an EV Air Conditioner and Controls" Symposium, 1988, Chicago, Illinois.|
|6||*||S. Ohba The Development of an EV Air Conditioner and Controls Symposium, 1988, Chicago, Illinois.|
|7||*||S. Ohba. The Development of an EV Air Conditioner and Controls, The 9th International Electrical Vehicle Symposium, Toronto, 1988.|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US6435293 *||Feb 1, 2000||Aug 20, 2002||Robert Williams||Air conditioned cart|
|US7679336||Feb 27, 2007||Mar 16, 2010||Ford Global Technologies, Llc||Interactive battery charger for electric vehicle|
|US7719232||May 1, 2009||May 18, 2010||Tesla Motors, Inc.||Method for battery charging based on cost and life|
|US7741816 *||Mar 28, 2008||Jun 22, 2010||Tesla Motors, Inc.||System and method for battery preheating|
|US7782021 *||Jul 18, 2007||Aug 24, 2010||Tesla Motors, Inc.||Battery charging based on cost and life|
|US7786704||May 1, 2009||Aug 31, 2010||Tesla Motors, Inc.||System for battery charging based on cost and life|
|US7867653 *||Sep 26, 2008||Jan 11, 2011||Sanyo Electric Co., Ltd.||Alkaline storage battery system|
|US8063609||Jul 24, 2008||Nov 22, 2011||General Electric Company||Method and system for extending life of a vehicle energy storage device|
|US8154246||Jan 30, 2009||Apr 10, 2012||Comverge, Inc.||Method and system for charging of electric vehicles according to user defined prices and price off-sets|
|US8212532 *||Jul 24, 2008||Jul 3, 2012||General Electric Company||Method and system for control of a vehicle energy storage device|
|US8307967||Jul 6, 2008||Nov 13, 2012||Satyajit Patwardhan||Widely deployable charging system for vehicles|
|US8432175||Apr 30, 2013||Lear Corporation||System and method for evaluating vehicle charging circuits|
|US8487589 *||Oct 27, 2010||Jul 16, 2013||GM Global Technology Operations LLC||Method and device for determining the start of a charging process for an energy storage device in an electric vehicle|
|US8504227 *||Nov 14, 2008||Aug 6, 2013||Toyota Jidosha Kabushiki Kaisha||Charging control device and charging control method|
|US8558511||Apr 7, 2009||Oct 15, 2013||Battelle Memorial Institute||Method and apparatus for smart battery charging including a plurality of controllers each monitoring input variables|
|US8564403||Jan 7, 2010||Oct 22, 2013||Mario Landau-Holdsworth||Method, system, and apparatus for distributing electricity to electric vehicles, monitoring the distribution thereof, and/or controlling the distribution thereof|
|US8587260||Jul 3, 2012||Nov 19, 2013||General Electric Company||Method and system for control of a vehicle energy storage device|
|US8725330||Jan 28, 2011||May 13, 2014||Bryan Marc Failing||Increasing vehicle security|
|US8760113||Oct 30, 2009||Jun 24, 2014||Qualcomm Incorporated||Wireless power charging timing and charging control|
|US8760115 *||Aug 20, 2009||Jun 24, 2014||GM Global Technology Operations LLC||Method for charging a plug-in electric vehicle|
|US8807445 *||Mar 12, 2009||Aug 19, 2014||GM Global Technology Operations LLC||Auxiliary heater pump control|
|US8841881||Jan 28, 2011||Sep 23, 2014||Bryan Marc Failing||Energy transfer with vehicles|
|US8963492||Dec 18, 2011||Feb 24, 2015||Comverge, Inc.||Method and system for co-operative charging of electric vehicles|
|US9114719||May 12, 2014||Aug 25, 2015||Bryan Marc Failing||Increasing vehicle security|
|US9160182||Jun 11, 2014||Oct 13, 2015||Qualcomm Incorporated||Wireless power charging timing and charging control|
|US9187085||Apr 24, 2014||Nov 17, 2015||Ford Global Technologies, Llc||Electric vehicle control based on operating costs associated with power sources|
|US20090011616 *||Jul 6, 2008||Jan 8, 2009||Satyajit Patwardhan||Widely deployable charging system for vehicles|
|US20090021218 *||Jul 18, 2007||Jan 22, 2009||Kurt Russell Kelty||Battery charging based on cost and life|
|US20090087741 *||Sep 26, 2008||Apr 2, 2009||Sanyo Electric Co., Ltd.||Alkaline storage battery system|
|US20090243538 *||Mar 28, 2008||Oct 1, 2009||Kurt Russell Kelty||System and method for battery preheating|
|US20100019718 *||Jul 24, 2008||Jan 28, 2010||General Electric Company||Method and system for extending life of a vehicle energy storage device|
|US20100019726 *||Jan 28, 2010||General Electric Company||Method and system for control of a vehicle energy storage device|
|US20100217485 *||Nov 14, 2008||Aug 26, 2010||Toyota Jidosha Kabushiki Kaisha||Charging control device and charging control method|
|US20100230505 *||Mar 12, 2009||Sep 16, 2010||Gm Global Technology Operations, Inc.||Auxiliary Heater Pump Control|
|US20100241560 *||Jan 7, 2010||Sep 23, 2010||Greenit!, Inc.||Method, system, and apparatus for distributing electricity to electric vehicles, monitoring the distribution thereof, and/or providing automated billing|
|US20100253290 *||Apr 7, 2009||Oct 7, 2010||Battelle Memorial Institute||Method and apparatus for smart battery charging|
|US20100280698 *||Apr 22, 2009||Nov 4, 2010||Toyota Jidosha Kabushiki Kaisha||Hybrid vehicle and method for controlling electric power of hybrid vehicle|
|US20100283432 *||May 11, 2009||Nov 11, 2010||Simon Ellwanger||Vehicle Timing Apparatus|
|US20100292855 *||Nov 18, 2010||Michael Kintner-Meyer||Battery Charging Control Methods, Electrical Vehicle Charging Methods, Battery Charging Control Apparatus, and Electrical Vehicles|
|US20110043165 *||Feb 24, 2011||Gm Global Technology Operations, Inc.||Method for charging a plug-in electric vehicle|
|US20110046828 *||Aug 18, 2009||Feb 24, 2011||Ford Global Technologies, Llc||System And Method For Controlling Electric Power In A Plug-In Vehicle From An External Power Source|
|US20110047102 *||Feb 24, 2011||Ford Global Technologies, Llc||Vehicle battery charging system and method|
|US20110109276 *||May 12, 2011||Gm Global Technology Operations, Inc.||Method and device for determining the start of a charging process for an energy storage device in an electric vehicle|
|US20130020864 *||Jul 18, 2012||Jan 24, 2013||Bayerische Motoren Werke Aktiengesellschaft||Charging an Electric Vehicle and Air Conditioning of the Vehicle Interior|
|US20140034401 *||Aug 3, 2012||Feb 6, 2014||Ford Global Technologies, Llc||Detecting Blockage of Air Flow Through Vehicle Traction Battery|
|CN102164772B *||Jul 2, 2009||Jun 3, 2015||通用电气公司||Method and system for control of a vehicle energy storage device|
|CN102216111B||Jun 24, 2009||Jul 23, 2014||通用电气公司||Method and system for extending life of a vehicle energy storage device|
|EP2219278A1 *||Nov 14, 2008||Aug 18, 2010||Toyota Jidosha Kabushiki Kaisha||Charging control device and charging control method|
|EP2219278A4 *||Nov 14, 2008||Aug 8, 2012||Toyota Motor Co Ltd||Charging control device and charging control method|
|EP2683055A4 *||Feb 13, 2012||Oct 28, 2015||Nec Corp||Charging control system, charging control method and program|
|WO2009012018A2 *||Jun 20, 2008||Jan 22, 2009||Tesla Motors Inc||Battery charging based on cost and life|
|WO2009120369A2 *||Mar 26, 2009||Oct 1, 2009||Tesla Motors, Inc.||System and method for battery preheating|
|U.S. Classification||237/5, 180/65.1, 320/109, 320/DIG.10, 320/DIG.16, 320/DIG.11, 324/427, 320/155|
|International Classification||B60H1/22, B60L1/02, B60H1/00, B60L11/18, H02J7/00|
|Cooperative Classification||Y10S320/11, Y10S320/16, Y10S320/10, Y04S30/14, Y02T90/169, B60L11/1838, Y02T90/16, H02J7/0077, B60L1/02, Y02T90/163, Y02T90/14, Y02T10/7291, Y02T90/121, Y02T90/128, B60H1/2218, B60L11/1816, Y02T10/7005, B60H1/00642, B60L11/184, B60L1/12, B60L2240/70, B60H1/22|
|European Classification||B60L1/12, B60L11/18L4, B60L11/18L7J, B60L11/18L7J2, B60H1/22, B60H1/00Y, H02J7/00M10C, B60L1/02, B60H1/22B1|
|Apr 5, 1993||AS||Assignment|
Owner name: FORD MOTOR COMPANY, MICHIGAN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SIMS, RONALD I.;REEL/FRAME:006475/0880
Effective date: 19921216
|Mar 31, 1999||FPAY||Fee payment|
Year of fee payment: 4
|Jan 8, 2001||AS||Assignment|
Owner name: FORD GLOBAL TECHNOLOGIES, INC. A MICHIGAN CORPORAT
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FORD MOTOR COMPANY, A DELAWARE CORPORATION;REEL/FRAME:011467/0001
Effective date: 19970301
|Apr 11, 2003||FPAY||Fee payment|
Year of fee payment: 8
|May 30, 2007||REMI||Maintenance fee reminder mailed|
|Nov 14, 2007||LAPS||Lapse for failure to pay maintenance fees|
|Jan 1, 2008||FP||Expired due to failure to pay maintenance fee|
Effective date: 20071114